course Home I Content l Grades l Assessments I Communication

course Home I Content l Grades l Assessments I Communication I Course progress v Table of Contents Unit 3 Test Prep m122 xc3 m122 xc3 L a L a ai Iyit u II UIII LII I LU L VV I LI point 30 feet from its base (on horizontal ground) in the direction of greatest tilt, the angle of elevation is 21 Find the angle e Give your answer in degrees rounded to the nearest hundredths place. 8.79 0 3 points Question 8 Find all exact solutions of V2 cos (x/2) 130 in theinterval [0.2Ro. 8, 5 8, 11 8, 13 6 6 points Question 9 Find all the solutions to: 2cos2e sin e cose sine 0 Select all solutions that apply from the list below. Assume EZ 2kn n/12 2kn n/6 2kn n/4 2kn n/3 2kn 5n/12 2kn n/2 2kn 7n/12 2kn 2n/3 2kn 3n/4. 2kn

Solution

sqrt2(cos(x/2))+1=0

cos(x/2)=-1/sqrt2

Taking cos^-1on both sides

x/2= cos^-1(-1/2) = 3pi/4

x=6pi/4=3pi/2